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ll l III I H UNITED STATES PATENT ()FFICE.

FRANZ SKVA-RA, OF WVARSAl/V, RUSSIA, ASSIGNOR TO ERNST BUCHHOLTZ,

OF SAME PLACE.

BOILER AND CONDENSER PLANT FOR H EATING FEED-WATER.

SPECIFICATION forming part of Letters Patent N 0. 578,031, dated March 2, 1897.

Application filed February 18, 1896. Serial No. 579,698- (No model.)

To all whom it may concern.-

Be it known that I, FRANZ SKVARA, a subject of the Emperor of Austria-Hungary, residing at Warsaw, a city of the Russian Empire, have invented certain new and useful Improvements in Boiler and Condenser Plants for Heating Feedater, of which the following is a specification.

This invention relates to portable steam- IO engines, locomotive-engines, marine engines,

and stationary engines; and it consists in the arrangement of an upright boiler and of a condenser within a water-tank in such a manher that the water therein takes up the surplus heat of the fire-box and the surplus exhaust-steam not condensed by the condenser.

I will describe a portable steam-engine embodying my invention, but I do not confine myself to the said engine, as the invention is also applicable to other engines having boilers and condensers.

In the accompanying drawings, Figure 1 is a vertical longitudinal section on the line ab of Fig. 3 of a portable steam-engine embody- 2 5 in g the invention. Fig. 2 is a vertical section on the line 0 d of Fig. 3. Fig. 3 is a plan with the top or head of the boiler removed, and Fig. 4 is a vertical section on the line e f of Fig. 3.

0 On the carriage-frame having two wheelaxles a rectangular water-tank l is mounted, which contains the feed-water. Two vertical cylindrical shells 2 and 3 are inserted in and riveted to the tank. These shells are ar- 3 5 ranged one behind the other. The large cylinder 2 is the shell of the fire-box and of the steam-gcnerator, and the small cylinder 3 incloses the condenser and a fan.

The lower part of the boiler-shell 2 is lined with fire-bricks. It serves as fire-box, and is provided with the grate 5, the ash-pit 6, and the damper 7.

The water in the tank 1 surrounds the firebox and insulates the latter externally, so. that the surplus heat is taken up by this feedwater.

The steam-generator is located within the upper part of the cylinder 2, and is preferably composed of several concentric serpentine pipes 8 and of a double boiler 9 10, Fig. 1, arranged within the innermost serpentine pipe. This boiler 9 10 serves both as steamgenerator and steam dome or collector.

The feed-Water is supplied to the lower part of the space between the two vessels 9 1O 5 5 and of the serpentine pipes 8 by means of a' pipe 12, Fig. 2, which extends transversely through the shell 2 and communicates on the one side with a feed-pump and on the other side with a gage-glass. The steam rising in do the serpentines enters the pipe 13, thence it flows downward through the central pipe 14, Fig. 1, and then it runs laterally through the branch pipes 15 into the narrow space between the two vessels 9 10, where this steam is mixed with the steam generated within the said space. This mixed steam is dried while rising by the hot inner wall of the vessel 9, which is heated externally by the fire-gases. The dry steam runs along the deflecting-cyl- 7o inder ll downward into the interior of the inner vessel, forming the steam dome or collector, and thence through the upper pipe 16, provided with a cut-oif valve 17 and safetyvalves 18, into the vertical steam-engine 4, which is fixed upon the carriage-frame before the water-tank 1 above the front axle.

The exhaust steam of the engine flows through the pipe 20, Figs. 3 and 4, extending through the water-tank 1 into the central pipe 21 of the condenser, the construction of which forms no part of my invention. My preferred form,as illustrated in the drawings, comprises three vertical spiral sheet-metal condensing-compartments 22, 22 ,and 22,arranged one above the other and so constructed that the cooling and condensing medium can circulate through the Vertical channels between the outer spiral walls of said compartments and so connected with pipe 21 that go the exhaust-steam will flow in the direction indicated by arrows in Figs. 1 and 4:. In so circulating it first passes through the uppermost spiral, from the inner to the outer end thereof, then enters the outer end of the mid- 5 dle spiral, flowing through this from the outer to the inner end, then runs down through the central pipe 21, and finally passes through the lower spiral, from the inner to the outer end thereof. 30 and 31 are plates within pipe 21 for deflecting the exhaust-steam into said condensing-compartments. During this passage the exhaust is condensed by means of a current of air produced by the fan 23, arranged in the lower part of the cylinder 3 and rotated by the pulley 27, forming one piece with a regulator.

The condensed water is collected within pipe 24:, Fig. 3, and is drawn bya hand-pump 25, together with water, out of the tank 1, which communicates by a pipe 28 with the casing of the said pump, the latter forcing the water through the pipe 12 into the steam-generator. The casing of the hand-pump will contain another feed-pump, (not shown,) being used when the engine works and being operated from the hub of the fly-wheel 29 by a belt.

The surplus exhaust'steam runs above the condenser through the elbow 26, Fig. 4:, into the water-tank 1, where it comes in contact with the water therein and is condensed.

The advantages of the described portable engine are, first, very small consumption of water, which is of great importance where the water has to be fetched from remote wells, as is mostly necessary, when the engine is used for agricultural purposes; second, feeding of the steam-generator for the most part with condensed water; third, saving in fuel attained by the condensation of the steam and by the absorption of the surplus heat by the water in the tank.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a steam-power plant, the combination with an engine and a steam-generator, having a narrow space between the two vessels 9 and 10, and means for delivering the steam to the engine, of a condenser, a water-jacket surrounding said generator and said condenser, and means for conducting the surplus exhaust into said water-jacket, and for feeding the generator out of said condenser and out of said jacket, substantially as setforth.

2. In a steam-power plant, the combination with an engine and a steam-generator, having a narrow space between the two vessels 9 and 10, and means for delivering the steam to the engine, of a condenser, a water-jacket surrounding said generator and said condenser, a feed-pump having its suction end connected with said condenser and also with the water-jacket, and a vapor-pipe leading the surplus exhaust into said water-jacket, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANZ SKVARA.

Witnesses:

BOLIDAN KRASICKI, VLADIsLAw KRoMIEWsKI. 

